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   AUTOMOTIVE      Anything to do with cars      2,177 messages   

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   Message 1,966 of 2,177   
   TOM WALKER to MARK HOFMANN   
   Re: chip programmers?   
   01 Feb 16 17:25:00   
   
   MH>JH> One thing I don't miss.... You can tell when you are driving behind a   
   MH>JH> carburated car nowadays because of the smell. When carbs deteriorate,   
   MH>JH> they are far less efficient. I think we used to take if for granted.   
      
   MH>That and not having a catalytic converter.  That made a big difference when   
   MH>comes to smell.   
      
   MH>The downside of having a computer control the vehicle is it totally relies o   
   MH>the sensors.  If one fails in a strange way it can cause the vehicle to run   
   MH>horrible.  I had an O2 sensor fail in a strange way on the Durango once.   
   MH>Instead of just going dead - which would have put the computer into a fail-s   
   MH>mode with regards to the O2 sensor, it was telling the computer it was getti   
   MH>too much gas (maxed the voltage reading and was stuck at that point).  This   
   MH>caused the truck to be starved for gas and could hardly get it to drive home   
      
   MH>When I hooked it up to my laptop, I saw that O2 sensor fail with a steady hi   
   MH>voltage vs the fluctuating reading you would normally see.  I replaced that   
   MH>sensor and it ran perfect again.  You would have thought the motor was dead   
   MH>just from the O2 sensor.   
      
   MH>- Mark   
      
   That is called the limp home mode. i had my Chev S10 have that happen   
   once.   
   It is a deliberate action because of the SMOG laws.   
   My Toyota Tacoma has Two oxygen sensors. One before the Cat converter to   
   set the Fuel Air ratio and another one after the Cat converter to tweek   
   the Emissions.   
   I just had to have them both replaced and they are NOT cheep.   
   The Air/Fuel sensor war $250 and the Reat sensor was $124   
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